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Clase ReflectionProperty

(PHP 5, PHP 7)

Introducción

La clase ReflectionProperty muestra información sobre las propiedades de una clase.

Sinopsis de la Clase

ReflectionProperty implements Reflector {
/* Constantes */
const integer IS_STATIC = 1 ;
const integer IS_PUBLIC = 256 ;
const integer IS_PROTECTED = 512 ;
const integer IS_PRIVATE = 1024 ;
/* Propiedades */
public $name ;
public $class ;
/* Métodos */
final private __clone ( void ) : void
public __construct ( mixed $class , string $name )
public static export ( mixed $class , string $name [, bool $return ] ) : string
public getDocComment ( void ) : string
public getModifiers ( void ) : int
public getName ( void ) : string
public getValue ([ object $object ] ) : mixed
public isDefault ( void ) : bool
public isPrivate ( void ) : bool
public isProtected ( void ) : bool
public isPublic ( void ) : bool
public isStatic ( void ) : bool
public setAccessible ( bool $accessible ) : void
public setValue ( object $object , mixed $value ) : void
public __toString ( void ) : string
}

Propiedades

name

Nombre de la propiedad. De sólo lectura, lanza una ReflectionException en un intento de escribir.

class

Nombre de la clase donde se define la propiedad. De sólo lectura, lanza una ReflectionException en un intento de escribir.

Constantes predefinidas

Modificadores ReflectionProperty

ReflectionProperty::IS_STATIC

Indica las propiedades static.

ReflectionProperty::IS_PUBLIC

Indica las propiedades public.

ReflectionProperty::IS_PROTECTED

Indica las propiedades protected.

ReflectionProperty::IS_PRIVATE

Indica las propiedades private.

Tabla de contenidos

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User Contributed Notes 2 notes

up
3
rasmus at mindplay dot dk
9 years ago
I think a more accurate explanation is this:

The Reflection classes are designed to reflect upon the source code of an application, not on any runtime information.

I think you misunderstand the ReflectionProperty constructor in your example above. The fact that it accepts an object as argument is just a convenience feature - you are actually inspecting the class of that object, not the object itself, so it's basically equivalent to:

<?php

// works fine
$Reflection = new ReflectionProperty(get_class($a), 'a');

// throws exception
$Reflection = new ReflectionProperty(get_class($a), 'foo');

?>

Getting the class of the object you're passing in is implied, since inspecting a defined property is the purpose of this class.

In your example, $a->foo is a dynamic member - it is not defined as a member of class, so there is no defining class reference, line number, default value, etc. - which means, there is nothing to reflect upon.

Clearly this very useful library could use some real documentation...
up
-5
Nanhe Kumar
5 years ago
<?php
//serialize static properties (class variable)

class Student {

    private
$members = array();
    protected
$name;
    public static
$noOfStudent;

    public function
__construct($name = 'Nanhe Kumar') {
       
$this->name = $name;
       
Student::$noOfStudent++;
    }

    public function
__sleep() {
       
$vars = get_class_vars(get_class($this));
        foreach (
$vars as $key => $val) {
            if (!empty(
$val))
               
$this->members[$key] = $val;
        }
        return
array_keys(get_object_vars($this));
    }

    public function
__wakeup() {
        foreach (
$this->members as $key => $val) {
           
$prop = new ReflectionProperty(get_class($this), $key);
           
$prop->setValue(get_class($this), $val);
        }
       
$this->members = array();
    }

    public function
getTotalStudent() {
        return
self::$noOfStudent;
    }

}

$so1 = new Student();
$so2 = new Student();
$serialized = serialize($so1);
print_r($serialized); //O:7:"Student":2:{s:16:"Studentmembers";a:1:{s:11:"noOfStudent";i:2;}s:7:"*name";s:11:"Nanhe Kumar";}
$unserialized = unserialize($serialized);
print_r($unserialized); //Student Object ( [members:Student:private] => Array ( ) [name:protected] => Nanhe Kumar )
echo Student::$noOfStudent; //2
?>
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